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Two-scale modelling of reactive powder concrete. Part II numerical simulations

Denisiewicz A., Kuczma M.

Engineering Transactions

2015

Vol. 63, iss. 1

35--54

This article is the second part of a series about two-scale modelling of reactive powder concrete (RPC). In the first part [2] a method of modelling RPC microstructure was presented, the boundary value problem of mechanics for a representative cell at the micro scale was formulated and solved. In this part we will consider a method for determining material parameters at the macro level, and describe a technique of enforcement of boundary conditions upon an RVE as well as illustrate the theoretical considerations with results of numerical simulations. In the third part of the series we will present the validation of the proposed numerical model, based on the computational simulations of full size beams made of two RPC mixtures and own laboratory testing of the beams.

Two-scale modelling of reactive powder concrete. P. 3, Experimental tests and validation

Denisiewicz A., Kuczma M.

Engineering Transactions

2015

Vol. 63, iss. 1

55--76

This article is the third and final part of a series about two-scale modelling of reactive powder concrete in the linear range. In the first part [1] a method of modelling RPC microstructure was presented, the boundary value problem of mechanics for a representative cell at the micro scale was formulated and solved. In the second part [2] a method for determining material parameters at the macro level was shown, a technique for enforcing boundary conditions upon an RVE was described, and the results of numerical simulations were presented. In this part we will present the results of laboratory tests of full-size beams made from two RPC mixtures, the results of numerical simulations of these beams and the validation of the proposed numerical model.

Dwuskalowe modelowanie zjawisk cieplno-wilgotnościowych podczas dojrzewania betonu zawierającego SAP nasycone wodą

Wyrzykowski M., Gawin D.

Fizyka Budowli w Teorii i Praktyce

2010

T. 5, nr 2

71-77

W pracy przedstawiono zastosowanie modelu matematycznego zjawisk cieplno-wilgotnościowych w ośrodku porowatym do dwuskalowego opisu zachowania się betonu poddanego pielęgnacji wewnętrznej przy pomocy super-absorbentnych polimerów (SAP) nasączonych wodą. Omówiono podstawowe założenia modelu matematycznego, a także przedstawiono schemat symulacji dwuskalowych. Zaprezentowane zostały przykłady numeryczne, służące wyznaczeniu efektywnych właściwości materiału, oraz stanowiące walidację eksperymentalną modelu.

The mathematical model of hygro-thermal phenomena in maturing concrete is applied for two-scale modeling of phenomena accompanying internal curing by means of SAP. The numerical examples illustrate the application of the simulations for determining the effective properties and overall macroscopic behaviour of concrete. The simulation results concerning autogenous strains of concretes with SAP or LWA addition are compared against some published experimental data [2], being an experimental validation of the model.